For those of you who have tried these, how do the flats work on an extremely wiggly little boy. I have been a big fan of the stay drys until recently. I love the trim ness and the absorbency. They are one of the few diapers I have tried which will contain my heavy wetter. Lately I am having problems getting them on him without a lot of shifting and bunching. I am wondering how the flats when pad folded compare to the stay dry. Do they stay in place better? Right now by the time I get the diaper on the insert has shifted halfway down because he is so wiggly.